Frank crawford



(No Model.)

P. CRAWFORD. STOP MECHANISM-FOR KNITTING MACHINES. No. 445.465. Patented Jan. 27, 1891.

WITNESSES INVENTOR 7 By Frank crawfini. mm/7% AMA 44 A TTOHNE VS UnrrEn STATES PATENT FFlCE FRANK CRAlVFORD, ()F NE\V 3RUNSW'ICK, NEYV JERSEY, ASSIGNOR F ONE-HALF TO ALFRED MARCH, OF SAME PLACE.

STOP MECHANISM FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 445,465, dated January 27, 1891.

Application filed June 28,1890. Serial No. 357,124. (No model.)

To all whom it may (Jo/warn:

Be it known that I, FRANK CRAWFORD, a citizen of the Unit d States, residing at New Brunswick, in the county of Middlesex and State of New Jersey, have invented new and useful Improvements in Stop Mechanism for Kni[ting-Machines, the, of which the following is a specification.

This in vcnt on relates to a stop mechanism of the kind employed in knitting-machines; and the invention consists in the details of construction set forth in the following specification and claims, and illustrated in the accpinpanying drawings, in which-- Figure 1 is a side elevation, partly in section, of stop nrechanism containing my invention. Fig. 2 is a plan view of Fig. 1., partly broken away. Fig. 3 is a section along line 00 a', Fig. 2. Fig. 4 is a detail view of a slide and adjacent parts. Fig. 5 is a detail inverted plan view of a disk. Fig. 6 is a detail view of a finger. Fig.7 is a view, partly in section, along line :rcc, Fig. 6. Fig. 8 is a detail View showing the belt-shifter when released. Fig. 9 is a section along line y y, Fig. 1. Fig. 10 is a section along line 5 .2', Fig. 1.

In the drawings, the letterA indicates a suitable stem or support carrying a guide or rim B, having suitable eyes 0 D for guiding the thread E to the work. In passing to the work the thread passes through the eye F of a finger G, and as long as said thread is stretched through the finger-eye F said finger is held up in the position shown in Fig. 1. The breaking of the thread allows the finger G to drop, and thereby stop the machine, as will be set forth.

The finger G is secured to a pin or axle H, extending through a suitable eye in the rim I of the plate K, secured to the stem A. The inner end of the axle H is bent or provided with a stud L. \Vhcn the finger drops, said stud L strikes against a shoulder M, formed be replaced by a lover or arm having but one shoulder and fulerumed at O. The fulcrum 0 is readily formed by a stud entering a suit.- able eye in the plate K. The lever or disk N has a stud P, entering a fork Q, secured to the slide R, whereby the lever or disk may be os cillated and set by moving the slide back and forth. A spring S tends to force the slide to ward the stop T. A lever or arm U, fulcrumed at V, is connected by a pin-and-slot connection WX to the slide It. The lever U has a stud or projection Y, and when the slide R is drawn away from stop T the lever U is moved so as to swing its stud Y toward the detent or catch Z, fulcrumed or pivoted at a.

A spring I) presses on the catch Z.

hen the stud Y is swung. toward the catch Z, said stud rides along the inclined face 0 of the catch and passes into the locking recess or shoulder (Z in said catch, the spring I) allowing the catch to yield sufliciently for the stud Y to enter the recess (1, after which the spring b forces the catch back to its locking position, so as to hold the stud in said recess. The lever U and slide R are thus held against the action of spring S, so that the slide R rests away from the stop T, Fig. 2. \V hen. now, the thread E breaks or runs out, the finger G drops, thereby causing its stud L to strike against a shoulder M, so as to move the arm or disk N and force the stud P against the tail e of catch Z, whereby the catch is forced to its releasing position against the pressure of spring Z) and the stud Y is released, whereupon the lever U and slide R are moved by spring S, so that the slide R comes to rest against the stop T, Fig. at.

T0 the slide R is connec ed an arm f, extending from the pivot g, which is provided with a finger h. Another finger 4; extends from the pivot 70, carrying a detent or hook Z. A spring m tends to force the detent Z to its engaging position. A lever 71, fulcrumed at 0, has a stud 19, adapted to be engaged by the detent Z. The lever n is connected by a pinand-slot connection qr to the belt-shifter or beltshifting slide 8. A springt tends to force the belt-shifter to the releasing position, so as to force the belt out of work.

\Vhen the finger G drops, the slide R, as already stated, is moved against the stop T,

thereby causing the slide to move the arm f, so that the finger h strikes against finger i and moves the detent Z to its releasing position against the pressure of spring m. The stud p is thus released, so that the lever n and belt-shifter s are moved by the spring t to hrow the belt out of work, Fig. 8. \Vhen the finger G is again threaded and held up, the slide R can again be set away from stop T, whereby the finger h releases finger 't', and the detent Zis moved by its spring we back to its engaging position. As long as the finger G is not threaded and held up, said finger will continue to force the stud P against the tail c of catch Z, so as to hold the catch in its releasing position and make it impossible for the slide R to be set away from the stop T and the finger h to be set so as to release the finger v} and detent Z. The belt-shifter s can thus not be set back, and the machine cannot be started until the finger G is threaded and held up.

The stem A, as seen, need not pass through the center of the plate K, but to one side of the center. In that case the axles ll of the fingers, instead of passing only through the rim I, may in some cases be lengthened, so as to pass through said rim and also through arms 11/, extending at different lengths from said rim, so as to compensate for the eccentricity ot the plate K and bring the various fingers G into position to be engaged by their respective threads as they pass through the va rious eyes 0 D.

The connection between the lingers G and axle H is readily formed by bending the end of the finger into a coil 1/, sitting about the axle, and providing the axle with a slot to, i ito which the finger G springs, so as to lock the axle and finger together.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a belt-shifter and a detent for said shifter, of a spring-actuated releasing slide or actuator R, intermediate devices operatively connecting the detent with the slide or actuator, a locking arm or lever U, connected to said slide, a catch or detent for said locking-arm, a releasing disk or lever N, made to act on said catch, and a finger G for actuating said disk or lever, substantially as described.

2. The combination, with a belt-shifter and a detent for said shit'ter, of a spring-actuated slide or actuator R, a finger 7t, devices connecting the latter with the slide or actuator, a finger 2', connected to the shifter-detent and actuated by said finger h, a locking arm or lever U, connected to said slide, a catch for said locking-arm, a releasing disk or lever N, made to act on said catch, and a finger G for actuating said disk or lever, substantially as described.

The combination, with a belt-shifter and a detent for said shifter, of a spring-actuated slide or actuator R, intermediate devices operatively connecting the detentwith the slide or actuator, a locking arm or lever U, connected to said slide, a catch for said lockingarm, a releasing disk or lever N, made to act on said catch, a fork Q and stud P for connecting the slide R and disk or lever N, and a finger G for actuating said disk or lever, substantially as described.

4. In a stop mechanism, the combination, with the spring-pressed slide or actuator R, of a slide-locking lever U, a spring-pressed catch or detentZ for holding the lever to lock the slide, the releasing-fingers G,and devices intermediate the catch or detenc and the fingers for causing thelatter to actuate the catch or detent and release the locking-lever, sub stantially as described.

5. A releasing-finger for a stop mechanism, said finger consisting of a wire stem having its end formed into a coil, in combination with an axle 11, made to enter said coil and provided with a notch for the engagement of the stem orfinger, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FRANK CRAWFORD.

Witnesses:

WM. 0. HAUFF, E. F. KASTENHUBER. 

